Comp cars are a different breed. Most are small displacement high winding combinations to keep the weight down. They don't need the brute strength of a 9" or 9.5" rear so the 12 bolt offers less drag, less weight and many gear ratio options.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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